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Lowrance's SONAR products graphically display underwater information (bottom contours and structure, schools of baitfish, individual game fish, thermoclines, etc.) and are used primarily by sport fishermen as fishfinders, and by recreational boaters as navigational and safety devices. Its GPS+WAAS mapping products are used by boaters for navigation, as well as by hunters, backpackers, RV enthusiasts, pilots and others to locate their positions precisely (to within 10 feet at select WAAS coverage areas of the U.S.) and to record up to 1,000 waypoints (favorite spots) in a unit's memory and return to those locations at any time in the future. The U.S. Department of Defense's elimination of Selective Availability (SA) within its constellation of satellites during 2000 instantly increased the worldwide accuracy levels of Lowrance GPS products by 10-times. In combination with the more recently installed Federal Aviation Administration's Wide Area Augmentation System (WAAS), positional accuracy, particularly in the southern hemisphere of the U.S., has been enhanced even more.